What is the name of the song?

I use the ACW as a guide here, not for tempo map etc . . .

Once I get the chords, I send to Biab and layout the song. Biab will not generate a perfect match of the original, so I choose a compatible style to get the beat,shots & holds etc... Inserting a 2/4 bar here and there should NOT affect the tempo, even for holds etc . . .

You probably need to place the correct 2/4 bars where needed and it should line up with the original tempo. Don't forget to set the next bar back to 4/4 though

Trax